Massage roller



FIG. 1 is a perspective view of my new design for a massage roller;

FIG. 2 is a right side elevational view thereof, the left side being an elevational view, top and bottom views being identical;

FIG. 3 is an end view from the left side of FIG. 1; and,

FIG. 4 is an end view from the right side of FIG. 1. 

I claim, the ornamental design for a massage roller, as shown and described. 